Apache Synapse

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Synapse has implemented a non-blocking HTTP/S transport implementation over the Apache HttpComponents/NIO module to handle thousands of concurrent requests using very little resources and threads. This implementation is capable of connection throttling to control the rate at which large messages are read and processed, and thus can handle heavy concurrent loads of large messages using constant memory.

Synapse also supports clustered deployments, with support for load balancing, throttling and caching over clustered deployments. The integration with an external Registry/Repository allows Synapse to use externally defined resources for mediation, as well as store its configuration into an externally managed Registry/Repository for SOA Governance. Synapse can be easily extended with custom Java extensions or POJO classes, or via Apache BFS scripting languages such as Javascript, Ruby, Groovy etc. Synapse ships with over 50 samples that can be executed out of the box.